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Related Experiment Videos

Chemistry and the hydrogenases.

David J Evans1, Christopher J Pickett

  • 1Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Colney, Norwich NR4 7UH. dave.evans@bbsrc.ac.uk

Chemical Society Reviews
|October 2, 2003
PubMed
Summary

Hydrogenases catalyze proton reduction to dihydrogen using metal-sulfur clusters. Understanding these natural catalysts may lead to new, cost-effective electrocatalysts for a future hydrogen economy.

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Area of Science:

  • Bioinorganic Chemistry
  • Electrocatalysis
  • Energy Conversion

Background:

  • The reduction of protons to dihydrogen (H2) is a fundamental reaction for energy technologies.
  • Hydrogenases are natural enzymes that efficiently catalyze this reaction using metal-sulfur clusters.
  • Current platinum-based catalysts are expensive and limited in supply.

Purpose of the Study:

  • To review the current understanding of how metal-sulfur clusters in hydrogenases catalyze proton reduction.
  • To explore the potential of designing synthetic catalysts inspired by hydrogenases.
  • To assess the feasibility of replacing platinum catalysts with earth-abundant metal-sulfur systems.

Main Methods:

  • Review of structural, spectroscopic, and mechanistic studies of hydrogenases.
  • Analysis of synthetic metal-sulfur cluster assemblies.
  • In silico modeling of catalytic mechanisms.

Main Results:

  • Hydrogenase catalysis involves intricate multi-step mechanisms within metal-sulfur clusters.
  • Synthetic models are beginning to mimic aspects of hydrogenase activity.
  • Earth-abundant metals like Nickel (Ni) and Iron (Fe) show promise in catalytic applications.

Conclusions:

  • Understanding hydrogenase mechanisms is key to developing efficient artificial catalysts.
  • Metal-sulfur cluster assemblies offer a viable alternative to precious metal catalysts.
  • This research is pertinent to advancing hydrogen production and uptake technologies for a sustainable Hydrogen Economy.

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